OK well here goes nothing. Why just plain why?

Every day I end up thinking about my crush, Ava. No big deal. But I have nightmares that my bro, Matt will one day be pissed at me and hurt her to make me fking pissed asf. Is this normal?!? Should I even tell matt about this one day or no? How can I deal with this?

?2016-01-07T17:35:09Z

I'm in eighth grade btw